13858 has 12 divisors (see below), whose sum is σ = 23058.
Its totient is φ = 6240.
The previous prime is 13841. The next prime is 13859. The reversal of 13858 is 85831.
It can be divided in two parts, 138 and 58, that added together give a square (196 = 142).
13858 is nontrivially palindromic in base 7.
It can be written as a sum of positive squares in 3 ways, for example, as 3249 + 10609 = 57^2 + 103^2
It is a nialpdrome in base 13.
It is not an unprimeable number, because it can be changed into a prime (13859) by changing a digit.
13858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318 + ... + 358.
213858 is an apocalyptic number.
13858 is a deficient number, since it is larger than the sum of its proper divisors (9200).
13858 is a wasteful number, since it uses less digits than its factorization.
13858 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 69 (or 56 counting only the distinct ones).
The product of its digits is 960, while the sum is 25.
The square root of 13858 is about 117.7200067958.
The cubic root of 13858 is about 24.0196598170.
The spelling of 13858 in words is "thirteen thousand, eight hundred fifty-eight".